Just call syntax-ppss-flush-cache instead of an explicit property. #786
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resolve #785
This issue was first introduced in #316 as a workaround for a problem with Emacs 25 not coloring properly. This approach was disadvantageous for large files, and although performance was improved in #531, we often suffered from flickering.
The previous approach of reapplying
php-syntax-propertize-function
was messing with Emacs' internal state, so resetting it seems to fix a lot of the issues.refs #491, #308