I have seen several forum members state that it is acceptable and they have received PR in a situation similar to yours. But you will not find any official documents that state the same.
Firstly, it depends on whether or not you would have received an ITA if you hadn't been awarded the extra points. If your score would have been above the cut-off for that specific draw even if you had only received points for one year, you are definitely in the clear and you can proceed.
It gets trickier if you would not have received an invitation at that point. IRCC's guidelines are pretty clear - you must meet the points threshold at both time of ITA
and when you apply.
https://www.canada.ca/en/immigration-refugees-citizenship/corporate/publications-manuals/operational-bulletins-manuals/permanent-residence/express-entry/assessing-electronic-application-on-section-a11-2.html
So in that case, in my opinion, the officer would have legal grounds to reject your application. Again - reports from forum members seem to suggest that there is some leniency in this context, possibly because the way the system is set-up makes it imprecise in the way it calculates work experience. But there is no way for me to tell you that his is definitely going to happen in your case.
So I would say that there is definitely some risk that your application could be rejected. How high the risk is - that's impossible for me to say.