DSR bolt sticking forward

[Slapshot Vrref]

So I have an issue with my DSR , recently reached the battery plug, went to use marker last weekend and the bolt is sticking forward after one shot .
Took bolt apart and cleaned and refused and still doing same thing , what's going on ?? All orings look good , fresh battery ,, full air tank ,, ??? Never had any other issues before with this marker .... HELP ????

[Daltech]

Have you recently disassembled the bolt? Or grips or hyper reg?

[Daltech]

The weather changing from hot to cold. Shouldn’t have any effect but magically it does. Paintballs go from ok to horrible in just one week!

[Daltech]

https://m.youtube.com/watch?v=1hVaXJ1e2dM