Low ping, high FPS, but getting caught on textures/lagging

Just BEFORE I updated my game this week, I was losing connection to the server constantly. That issue lasted for about an hour and it looks like it’s gone away.

However, I’m now left with a consistent and annoying lag. I am not teleporting or freezing, but whoever I’m playing keeps getting caught on stairs, in doorways, or when standing on rubble or broken pieces of the environment. It’s like playing on ice, I just keep sliding around or moving in the wrong direction whenever I’m caught (stairs, doorways, rubble). It’s making it extremely difficult to play and has lasted ever since the update… I’m just not sure if that’s the issue ):

I’ve done speed tests and meddled with my router and PC as much as I can and I’m still getting a very fast connection, it’s just getting stuck on these textures. I don’t know what to do! Please help!