WotLK issues in-game.

[ExCawz]

I'm having these issues;

Whenever I fly around,
My UI bars suddenly disappears (unless i'm looking in a certain direction) and during this time my fps drops like crazy. https://imgur.com/a/YLk4c
90% of the time, this usually follows with a game crashing and having to re-log.

This is one issue.... And the other is,

Sometimes, when I fly into Dalaran or Icecrown, my game just crashes.

Anyone have any ideas how I can fix these problems?

[skullatbash]

for first problem make a test without any Addons

For second problem you may try to delete WoD models

[ExCawz]

for first problem make a test without any Addons

For second problem you may try to delete WoD models

I don't use WoD models.

I will try test without Addons and see how that works out.