Cz shadow safety

[Kernalcanoe]

Hi gunz! Looking for some advise on my recent purchase.
Bought a nice condition shadow but having a problem. The safety is extremely difficult to engage. Fully cocked of course. I did take the hammer spring our to clean and oil as is was squeaking, and I did switch the mag release from one side to the other. Could I have gotten oil in the trigger grouping and caused this?
I can take safety off with ease but to engage is almost impossible.

Help!!!

Thanks a lot to any one that can assist

 

[Kernalcanoe]

Well.... I came home today and started to clean and the gun now works perfectly! Wtf! I guess the gun fairy stopped and fixed! I have no idea! But I'm happy.

 

[adamg]

I was going to suggest that the detent plunger on the left side safety was installed incorrectly.

 

[Kernalcanoe]

I've taken down again and back together and all is great! Ty for response!