Your question can be answered by yes and no, depending on the level of your understanding of what strength is. Strength isn't a monotonously increasing quantity, it's a very chaotic variable that goes through deep valleys (when you are overreaching and accumulating a lot of fatigue through high volume training) and high peaks (when you are coming out of a successful peaking cycle). There is an excellent blog post by Bryce Lewis called Peaks & Valleys on that very topic.
Most strength athletes spend a massive portion of their time in offseason training (searching for "offseason powerlifting" on Google yields a dozen fascinating results), which is usually hypertrophy specific. Research has shown that the cross-sectional area of a muscle is the most direct predictor of its strength and thus it stands to reason that increasing its size is the most reliable way to become stronger, in addition to the other benefits that it brings w.r.t health and longevity (bigger muscles can protect your joints in several physical activities, including lifting heavy weights, and help you maintain a leaner physique, which is good for both your lifespan and your quality of life).
That being said, staying a long time in hypertrophy specific training will decrease the strength you can express at that instant. That doesn't mean that your muscles are becoming weaker, just that they adapt to the required demand and the required demand at that instant isn't to lift maximal loads. The strength will come back extremely fast with an appropriate intensification & realization/peaking cycle (do some research on block periodization if you want to learn more about that). You can help this happen faster by still practicing the sports-specific skills on which you would like to express your strength all throughout your hypertrophy cycle (so for instance, if you were training for a powerlifting meet, keeping a large portion of squat, bench press and deadlift along with your bodybuilding exercises during your hypertrophy cycle in order to practice your form with lower weights).