Not directly CONST related, but nevertheless it seems to match into this topic.
Probably another camel case issue? At least it worked in earlier (pre-camel) versions.
Positive/negative DECIMAL numbers with explicit type suffix added are not highlighted anymore (eg. 3.14#, 25&, -4096&& etc.)
As said it affects decimal numbers only, &B/&H/&O prefixed numbers such as &HFF&&, &B1111& are working ok.
BTW - It doesn't matter if camel case is on/off, it's not highlighted in either mode.