This may well have been the precursor to your issues. It is possible to avoid hard resets or shutdowns using REISUB/REISUO:
Note that kernel 6.15 reached EOL five months ago and updates are no longer provided from the Manjaro repositories.
It is strongly suggested to switch to another kernel at your earliest convenience – current viable options include kernels 6.17 or 6.12 (LTS) – the latter is generally recommended.
Which programs might they be? Perhaps someone will have an alternative to suggest, or a WINE based solution.
Please provide system information as described (below) which may allow others to identify other possible contributors to the problem.
I’m sure someone will help when they are able.
Regards.
Welcome to the Manjaro community
As a new or infrequent forum user, please take some time to familiarise yourself with Forum requirements, and the many ways to use the forum to your benefit.
To that end, links are provided (below) - Please use them.
Be prepared to provide outputs from various commands when asked. It’s equally important to provide as much actionable information as possible in your first post, rather than simply indicating there is a problem.
Waiting for others to blindly ask questions can be counter-productive – typically, nobody has a 
at their disposal – Instead, please help others to make informed suggestions, based on information you provide.
Update Announcements
The Update Announcements contain important information and a Known Issues and Solutions section that should generally be checked before posting a request for support.
System Information
While information from *-fetch type apps might be fine for someone wishing to buy your computer, for Support purposes it’s better to ask your system directly; 
Output of the inxi command (with appropriate parameters, and formatted according to forum guidelines) will generate information useful for those wishing to help:
inxi --filter --verbosity=8
or the short form (preferred):
inxi -zv8
- inxi man pages (Arch Manual)