Using a pulse type filament sensor and z-stop port

ComedianTF2

I've spotted an interesting behavior where it seems like the zstop port is reporting about 10x times the pulses compared to other ports. I did not manage to find documentation about this, or was able to change the result

I've tested it out by swapping out the primary and secondary sensors, and the readings are consistent.

Swapping the secondary to a different port (ie the e0stop, ystop, or any other port) seems to work, it's only the zstop port that's giving weird readings

M591 D0 P7 C"e1stop" S1 L3.32 E10 R50:150 ; Primary hotend pulse type detector
M591 D1 P7 C"zstop" S0 L0.235 E5 R10:3000 ;Secondary hotend pulse type detector

Any clue why this is happening? is it a hardware related problem?

M122:

m122
=== Diagnostics ===
RepRapFirmware for Duet 2 WiFi/Ethernet version 3.4.5 (2022-11-30 19:36:12) running on Duet WiFi 1.02 or later + DueX5
Board ID: 08DLM-996RU-N8PS4-6J9D0-3S86R-KAU3N
Used output buffers: 3 of 26 (23 max)
=== RTOS ===
Static ram: 23836
Dynamic ram: 77464 of which 12 recycled
Never used RAM 7912, free system stack 172 words
Tasks: NETWORK(notifyWait,13.8%,237) HEAT(notifyWait,0.0%,329) Move(notifyWait,0.0%,363) DUEX(notifyWait,0.0%,24) MAIN(running,86.1%,438) IDLE(ready,0.1%,30), total 100.0%
Owned mutexes: WiFi(NETWORK)
=== Platform ===
Last reset 00:42:37 ago, cause: power up
Last software reset at 2023-05-12 16:57, reason: User, GCodes spinning, available RAM 7532, slot 1
Software reset code 0x0003 HFSR 0x00000000 CFSR 0x00000000 ICSR 0x0041f000 BFAR 0xe000ed38 SP 0x00000000 Task MAIN Freestk 0 n/a
Error status: 0x00
Aux0 errors 0,0,0
Step timer max interval 0
MCU temperature: min 17.4, current 25.5, max 25.8
Supply voltage: min 24.1, current 24.2, max 24.4, under voltage events: 0, over voltage events: 0, power good: yes
Heap OK, handles allocated/used 99/15, heap memory allocated/used/recyclable 2048/228/8, gc cycles 0
Events: 0 queued, 0 completed
Driver 0: standstill, SG min n/a
Driver 1: standstill, SG min n/a
Driver 2: standstill, SG min n/a
Driver 3: standstill, SG min n/a
Driver 4: standstill, SG min n/a
Driver 5: standstill, SG min n/a
Driver 6: standstill, SG min n/a
Driver 7: standstill, SG min n/a
Driver 8: standstill, SG min n/a
Driver 9: standstill, SG min n/a
Driver 10: 
Driver 11: 
Date/time: 2023-05-15 12:34:01
Cache data hit count 4294967295
Slowest loop: 17.74ms; fastest: 0.19ms
I2C nak errors 0, send timeouts 0, receive timeouts 0, finishTimeouts 0, resets 0
=== Storage ===
Free file entries: 10
SD card 0 detected, interface speed: 20.0MBytes/sec
SD card longest read time 3.4ms, write time 0.0ms, max retries 0
=== Move ===
DMs created 83, segments created 0, maxWait 0ms, bed compensation in use: none, comp offset 0.000
=== MainDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== AuxDDARing ===
Scheduled moves 0, completed 0, hiccups 0, stepErrors 0, LaErrors 0, Underruns [0, 0, 0], CDDA state -1
=== Heat ===
Bed heaters -1 -1 -1 -1, chamber heaters -1 -1 -1 -1, ordering errs 0
=== GCodes ===
Segments left: 0
Movement lock held by null
HTTP is idle in state(s) 0
Telnet is idle in state(s) 0
File is idle in state(s) 0
USB is idle in state(s) 0
Aux is idle in state(s) 0
Trigger is idle in state(s) 0
Queue is idle in state(s) 0
LCD is idle in state(s) 0
Daemon is idle in state(s) 0
Autopause is idle in state(s) 0
Code queue is empty
=== Filament sensors ===
Extruder 0 sensor: no data received
Extruder 1 sensor: no data received
=== DueX ===
Read count 1, 0.02 reads/min
=== Network ===
Slowest loop: 16.32ms; fastest: 0.00ms
Responder states: HTTP(0) HTTP(0) HTTP(0) HTTP(0) FTP(0) Telnet(0)
HTTP sessions: 1 of 8
= WiFi =
Network state is active
WiFi module is connected to access point 
Failed messages: pending 0, notready 0, noresp 0
WiFi firmware version 1.27
WiFi MAC address ec:fa:bc:5b:3c:a9
WiFi Vcc 3.36, reset reason Turned on by main processor
WiFi flash size 4194304, free heap 22672
WiFi IP address 192.168.178.57
WiFi signal strength -61dBm, mode 802.11n, reconnections 0, sleep mode modem
Clock register 00002002
Socket states: 0 0 0 0 0 0 0 0