Again: Ruby syntax: Wrong recognition of symbols at the place of calling a class methods. Now in v11.12.0 #4516

I already wrote about this issue for version v11.11.1, the issue was closed, but the bug still remains.

Wrong recognition of symbols Ruby at the place of calling a class methods.
Class methods may be call via:
ClassName::method
but it recognized as symbol :method, also now ClassName: reconized as a symbol.

Which language seems to have the issue?
Ruby

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Sample Code to Reproduce
:symbol
symbol:
A::a - call class method

To fix the bug:

Just replace
':(?!\\s)' to '(?<!:):(?!\\s)'
and
'(!|\\?)?:' to '(!|\\?)?:(?!:)'

Is it really that hard to do? The bug came from the previous version and was not fixed.