I have not encountered before.

Product: Apex Legends
Platform:PC
Please specify your platform model. PC
AMD or Nvidia Model Number gtx 1650
Enter RAM memory size in GB 16 GB
What is your gamertag/PSN ID/EA Account name? Kizzzill
Please provide your squad mates' gamertag/PSN ID/EA Account name if possible. Kizzzill 
Are you using any software with an overlay? No
If yes, can you list them here? No
If you disable this software, does that have any effect? No
Which Legend were you playing (if applicable)? Bangalore
Which Legends were your squad mates using (if applicable)? All
Where did the issue occur? In the match
Which part of the map or menu were you in? If you don't remember the exact name, please describe the area or what you were trying to do in the menu. Olympus
What were you doing when the issue occurred? E.g. respawning a squad mate at a beacon, using an ability, a squad mate left the game. Just went into the match
Did your squad mates also experience the issue? I don't know
How many matches had you played in a row before the issue occurred? 1
When did this happen? (dd.mm.yy hh:mm) 22.04.2025 15:45 (Approximate time)
How often does the bug occur? very rarely
How severe is your issue? Major impacts to gameplay
What happens when the bug occurs? The weapon disappears and the loading screen flashes
What should be happening instead? The weapon should not disappear
Steps: How can we find the bug ourselves? sorry, i dont know, I caught her by chance

So, I look around, performing quests launched another match. Having entered the match for some reason, my weapon disappeared, and then something else began. Of course sorry, I can't explain it, it's better to watch the video material