Criteria pane handles strings, resembling decimals, incorrectly
When using Criteria pane and want to filter by varchar(50) column using value 27208863,10353, it shows that it is treated like string, but only after the value was determined as decimal earlier, resulting in inserting wrong value to the query being executed.
You have to insert the value in quotes manually to get correct results.
27208863,10353 => '27208863.10353'
'27208863,10353' => '27208863,10353'
Same behavior in SSMS 17.7 and 18.1.