Unexpected behaviour when opening next file in folder if multiple tabs are open

[WipeoutMan]

SumatraPDF version

• Version 3.6.16779 64-bit pre-release

Describe the bug
Unexpected behaviour when opening next file in folder if multiple tabs are open.
The bug happens when using CmdOpenNextFileInFolder / CmdOpenPrevFileInFolder commands (custom shortcut or default key combination).

To Reproduce
1 - Files a.pdf and b.pdf are located in ./Folder1
2 - Files c.pdf and d.pdf are located in ./Folder2
3 - With sumatrapdf closed, open file a.pdf
4 - CmdOpenNextFileInFolder / CmdOpenPrevFileInFolder works as expected
5 - Now open c.pdf (will be the second open tab).
6 - Running CmdOpenNextFileInFolder repeatedly will cycle the second tab: c.pdf > d.pdf > a.pdf > command stops working further.
7 - Running CmdOpenPrevFileInFolder repeatedly in second tab cycles between a/b/c/d files.

Its worth saying that if step 4 is skipped, in step the behaviour of CmdOpenNextFileInFolder is as expected at first for files in folder2 (c/d), but after trying to run the command for the files in folder1 (a/b), the command breaks again for all files.

Bound shortcuts in adv. settings file:
Shortcuts [
[
Cmd = CmdPrevTab
Key = Ctrl + Shift + Tab
ToolbarText = Prev. Tab
]
[
Cmd = CmdNextTab
Key = Ctrl + Tab
ToolbarText = Next Tab
]
[
Cmd = CmdOpenPrevFileInFolder
Key = XButton2
ToolbarText = Prev. File
]
[
Cmd = CmdOpenNextFileInFolder
Key = XButton1
ToolbarText = Next File
]
]

[WipeoutMan]

I'm no coder, but maybe there is some bug in the OpenNextPrevFileInFolder function?