No la the actual 85-125mm lens really blurry.
Anyway some updates from Zackbucks :
传说中改善发热锁频机制的 Xperia 1 IV 新固件就这样不声不响来了。
更完了,目前38℃不锁刷新率了,容我再用一会儿看看
Translate :
The new firmware for the Xperia 1 IV, which is said to improve the thermal locking mechanism, is here quietly.

The update is over, the refresh rate is not locked at 38°C, let me use it for a while and see
Hope it produce miracles haha
Update :
索尼 Xperia 1 IV 64.0.F.7.62 更新发热情况小结,综合了自己和群友各位用户的体验:
总体而言就是:算法更聪明,使用更流畅。
之前的固件版本电池温度一到 38℃ 就锁 60 帧降性能,夏季日常很容易就到这个温度了,降低性能后连扫码打开相机都卡顿。
更新之后不会卡死在某个温度立马锁,有测试到 42℃ 还继续 120 高刷的,貌似是如果温度升高速度加快就会锁,温度有降低的趋势就会放开。
这样带来的体验比之前版本好不少,不过因为高刷频率高了,耗电也会增多,推荐更新。
The Sony Xperia 1 IV 64.0.F.7.62 update fever summary, based on the experience of myself and all users in the group:
In general: smarter algorithms and smoother usage.
The previous firmware version locked 60 frames of performance when the battery temperature reached 38°C. In summer, it is easy to reach this temperature in daily life. After the performance is reduced, even scanning the code to open the camera freezes.
After the update, it will not be stuck at a certain temperature and immediately lock. Some people continue to brush at 120 when the temperature reaches 42°C. It seems that if the temperature rises faster, it will lock, and if the temperature tends to decrease, it will be released.
This brings a much better experience than the previous version, but because of the high refresh rate, the power consumption will also increase, and it is recommended to update.