I was playing sandbox CTF and on grass when I tried to go forward there was like a invisible wall which didn't let me go forward and a ramp which suddenly made me go ascending and eventually flip. and also like a a jump bug which other players have reported of, I jumped automatically where no tank was spawining and nothing was there and I was jumping like horribly flipped.
also interesting thing, not a bug but it was 15min match and till first 7-10 min nothing was there normal gameplay was going on and then 5 goldboxes fell in last 6-8 minutes in proper intervals.
5 GOLDBOXES I was like Oh man! what is this :P
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