page-link-prev page-link-next font size error

I use this module in several places and I have a visual bug I can't understand.
I use it (ng2-smart-table 1.3.5) along side with:

- angular 6.1.7
- ng-bootstrap 3.3.1 (bootstrap 4.1.3)
- ng2-tree 2.0.0-rc.11
- ... Do you need all the list ?

I have on Safari and Chrome (both on MacOS) a little incoherency on the definition of the page-link-prev and page-link-next font size [here](https://github.com/akveo/ng2-smart-table/blob/ba5521c1c55d96f953e47c162d443ed07c80cc20/src/ng2-smart-table/components/pager/pager.component.scss#L22).

This make the '<' and '>' smaller that the rest of the pager line. See the screenshot:

This is corrected by removing the line of css that set the font-size for those links:

I'm I the only one to get this glitch ? Maybe I'm not using it correctly somewhere or there is some incompatibility with my configuration ?