Fix envelope follower timings getting stuck at 0ms

Regression from f6ef95db3e.

plugins/spectral_compressor/CHANGELOG.md

@@ -6,6 +6,13 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic
 Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [Unreleased]
+
+### Fixed
+
+- Fixed a regression from version 0.4.0 that caused the envelope followers to
+  always be stuck at their fastest timings.
+
 ## [0.4.0] - 2023-03-22
 
 ### Added

plugins/spectral_compressor/src/compressor_bank.rs

@@ -693,6 +693,7 @@ impl CompressorBank {
                 params.global.compressor_release_ms.value(),
             )
         };
+        self.envelopes_were_reset = false;
 
         // The coefficient the old envelope value is multiplied by when the current rectified sample
         // value is above the envelope's value. The 0 to 1 step response retains 36.8% of the old
@@ -746,6 +747,7 @@ impl CompressorBank {
                 params.global.compressor_release_ms.value(),
             )
         };
+        self.envelopes_were_reset = false;
 
         // See `update_envelopes()`
         let effective_sample_rate =