Using a backtick causes the following character to be accentuated

[momesana]

While using the font in a web application, any combination of + char e. g. (a or `x) results in a character with a grave accent. There are similar issues with a caret (i.e. ^) sign in combination with another character. The issue is very much similar to the one described here regarding the noto sans fonts (https://github.com/googlei18n/noto-fonts/issues/736, https://news.ycombinator.com/item?id=12655054). I've included the type-face as follows:

@font-face {
    font-family: 'Gidole';
    src: url('../fonts/Gidole/Gidole-Regular.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}

Using Noto Sans:

Using Gidole:

Interestingly, this issue only pertains to the *.ttf fonts available for download. The Gidole homepagemakes use of a *.woff variant of Gidole (hosted here: http://gidole.github.io/fonts/Gidole.woff) that does not suffer the same problem.