missing font in packaged files
I am regularly exchanging files with a client - we both package the file and work on the packaged files only. My understanding is that ID will use the fonts and images from the packaged file folders [fonts, links]. The ID files are part of book files and there are more than 100 files. the fonts that are often shown as missing is are Montserrat-Bold.ttf, Montserrat-light_0.ttf; monterrat-REgualr.ttf and Montserrat-SemiBold.ttf. I took great care when initially creating these files to only use Montserrat.ttf fonts although there was a conflict with fonts form Typekit. By deleting the typekit fonts, I thought the problem was cleared. However, when I receive the packaged files, they are ok the first time I open them . AS soon as I change and save them , the next time I open, I get messages about these missing fonts. I have discovered that by deleting the fonts in the packaged "fonts" folder - the fonts are ok [not missing]. I do this to avoid having to reassign all the missing fonts in each of the many more than 100 files. I would like to understand this a bit better and to know if this is the best solution. Please help me to grok this. [Windows 10, CC2018,
ann