SL9 reverting back to stock when not using a under barrel grip

Hello EA. Thank you for reading this report. The SL9 SMG has an issue where the gun will revert back to stock if you dont use a grip under the barrel. Im aware that there was a bug where not running a muzzle causes this issue. But it is not the muzzle this time. The attachments im trying to run are Compensated brake, 11" Heavy Extended barrel, 60RND mag, standard ammo, and 1.75x sight. No under barrel, no ergonomics. After extensive testing this consistently reverts when you dont run any under barrel attachment at all. But If you use Any under barrel attachment the guns modification will save. But without its gone every time. The modification will stay for the duration of a game. But anytime a match is complete it will revert back. If you need any additional information dont hesitate to ask for additional details that will help you repeat this bug and fix the code. You are amazing! Great job with the game! Keep it up!

Please fix this quickly as Its frustrating replacing my atrachments at the start of every match as I'll frequently miss the first wave of vehicles and have to wait for things to respawn or just walk.