L.O 4.4.2 giving wrong math symbols

I’ve just updated from 4.4.1.2 to 4.4.2. However in formula input some symbols are badly wrong. Brackets as telephone pictograms as an example. Back to 4.4.1.2 also back to normal Am I the only one?

Cause turned out to be lack of Open Symbol font in Windows font folder. This was not my discovery but gleaned from a myriad of similar queries apparently sourced from L.O but discovered through Google.