Problem with extcap preferences in TShark (Wireshark) 3.4.2

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Yes it does.

ethercat.dll            0.1.0   dissector       C:\Program Files\Wireshark\plugins\3.4\epan\ethercat.dll
...
cc1352r1.exe            0.0.1   extcap  C:\Program Files\Wireshark\extcap\cc1352r1.exe
cc2531.exe              0.0.1   extcap  C:\Program Files\Wireshark\extcap\cc2531.exe

Actually,I can use the plugins in Wireshark UI, that's what I found most strange.

Then try printing the preferences, this will be huge so either filter with the tools of your choice or redirect to a file and look with an editor. Using PowerShell:

tshark -G currentprefs | Select-String cc2531

Yes it is present:

PS C:\Program Files\Wireshark> .\tshark.exe -G currentprefs | Select-String cc2531
extcap.cc2531.channel: 14

That means it is written in the configuration file, but I think tshark does not recognize it that is why it shows this warning:

** (tshark.exe:8004): WARNING **: No such preference "extcap.cc2531.channel" at line 398 of
C:\Users\hgir\AppData\Roaming\Wireshark\preferences (save preferences to remove this warning)

I'm not sure what's going on, maybe create a new profile in Wireshark to clean out old preferences, then pass that into tshark with -C.

There have been a few changes in the extcap interface that might explain the issue. Your extcaps use a manual method of constructing the output to describe the plugin options, whereas a common method is provided to do that in the current version of Wireshark, but it's not clear to me that the old manual method is wrong.

I've already tried it with clean profiles and it didn't work. If you have located the commits that may have caused the problem I can test them looking for the beginning of the problem and give a proposal for fixing it.

I haven't gone through the commits just comparing the code in your extcaps with that for sshdump. There are framework methods for handling options etc.