Is there any possibility the battery on your Stryd Live may need replacement? Don’t quote me on this, but I believe it uses a standard CSR-2032 button battery. It’d be a good idea to double-check your manual before buying a replacement.
Are you pairing with your Windows 8 PC or your iPhone? Would you mind ensuring only one of those devices are logged in at a time? Also, if you’re running any other training apps on either your Windows 8 PC or your iPhone - even the official manufacturer’s app for your footpod, please ensure your Stryde is unpaired and the program is exited. Rebooting your PC or force-rebooting your iPhone may help.
Let me know if you’re still noticing inaccuracies afterward.