Renaming a file is really slow

Checklist

[X] I can reproduce the bug with the latest version given here.
[X] I made sure that there are no existing issues - open or closed - to which I could contribute my information.
[X] I made sure that there are no existing discussions - open or closed - to which I could contribute my information.
[X] I have read the FAQs inside the app (Menu -> About -> FAQs) and my problem isn't listed.
[X] I have taken the time to fill in all the required details. I understand that the bug report will be dismissed otherwise.
[X] This issue contains only one bug.
[X] I have read and understood the contribution guidelines.

Affected app version

1.0.0

Affected Android/Custom ROM version

Android 11

Affected device model

Nokia TA-1157

How did you install the app?

F-Droid / IzzyOnDroid

Steps to reproduce the bug

Have a long list of previously recorded files (68 in my case, see additional info for more on this).
Rename a file
See how long it takes for the app to do it

Expected behavior

Renaming a file should be fast and uneventful, whatever you list of previously recorded files is.

Actual behavior

If you have a long list of recordings, renaming a file makes the app lag extremely, even as to trigger a system message saying the app is unresponsive. In my case, it takes up to 18 seconds.

Screenshots/Screen recordings

No response

Additional information

My record folder contains 68 files for a total of 55,8 MB. They are all .m4a files created with VoiceRecorder. Although when selecting this folder through VoiceRecorder, it only counts and lists 17 files, vhich may constitute a piece of the answer (or may be worth anwther issue entirely).

FossifyOrg / Voice-Recorder