I can think of several things that might be an issue. It could be one, or any of the following:
1) The razor is not stropped to a keen edge. It may be honed and sharp, but not keen enough (determine this with the wet thumb pad only).
2) Try adding a steam towel (or just a plain washcloth soaked in hot water then wrung out) to your lathered face (rub the lather into your beard with your fingers) for a minute or two (if you can hold your head back that long), remove the cloth and lather, then lather again.
3) Make sure your lather is properly hydrated. Slightly, but not too stiff a lather.
4) Use multiple
short point leading gliding strokes while stretching the skin (see illustration attached below showing 1-2-3 separate, short strokes). Don't try long, scraping strokes.
5) Use just enough pressure against the skin to slightly indent.
6) Try wetting the blade with warm water while shaving.