Feeling Frustrated

I have been losing since the end of February, 44M SW:331 CW:27O GW:231 but have really ground to a halt the past 3 weeks.

I am down a net 1 pound over the last 3 weeks despite maintaining the same diet and calorie goals. I stay under 1,800 calories on a high protein, low carb diet, also 16:8 IF.

3 weeks ago I started incorporating exercise into the routine, riding a stationary bike 5-7 miles a day, 5-6 days a week.

Everything that I read is just stay the course and that it's likely my body is adjusting to the exercise. I'm definitely still in a calorie deficit, not concerned there, and I largely eat the same foods for meals, it's just easier that way.

It's growing more and more difficult to stay motivated and not stray from what's been working. Getting on the scale every morning to see no change is taking away all of my motivation.

Any thoughts, insight, or other info would be appreciated, especially if anyone has gone through a similar situation and how you came out the other side.

Thanks!