Steps taken:

1. Take Combat Jacket from ground to hands
2. Open inventory
3. Swap Combat Jacket and Patrol Jacket
4. Hold 'square' to drop Patrol Jacket on ground
5. Highlight items within Patrol Jacket in 'vicinity' panel and repeatedly press 'square' to add them to inventory
6. All but three items moved to inventory as normal

In case it helps you diagnose the issue, I discovered a workaround for this issue with the following steps:

To recover the 'stuck' Mlock-91 Mag

1. Open inventory, select 'to hands/swap' on the Mlock-91 pistol
2. Move cursor to the Mlock-91 magazine slot and press 'square' to move the currently installed mag to inventory
3. Move cursor to the vicinity panel and highlight 'stuck' Mlock-91 magazine in the Patrol Jacket on the ground and select 'Combine' to install it into the Mlock-91's magwell

To recover the 'stuck' 7.62x39mm rounds

1. Open inventory and select 'to hands/swap' on a fully loaded (30/30 rounds) KA-M magazine
2. Close inventory
3. Unload rounds from KA-M magazine
4. Open inventory
5. Move cursor to 7.62x39mm rounds 'stuck' in Patrol Jacket and select 'Combine'
6. Load 'stuck' 7.62x39mm into KA-M magazine
7. Open inventory and return KA-M magazine loaded with previously stuck 7.62x39mm to inventory
8. Repeat steps 1-7 for 7.62x39mm tracer rounds.

Thank you, and great work on 1.10.