Ha ha ha, get used to it.
I reckon it's all the disrespectful foreigners arriving, the Thai's are fed up with all the nasty, hostile, abusive, moaning foreigners.
I've commented a few times on this forum, how times have changed over the last 25 years.
It's not only restaurants, it's government departments, shopping centres, transportation services etc,
At times I'm ashamed, all these toxic foreigners are ruining things, the good times are over....all gone.