diff --git a/rss-bridge/Chart.yaml b/rss-bridge/Chart.yaml
index bde18f1..f4170d0 100644
--- a/rss-bridge/Chart.yaml
+++ b/rss-bridge/Chart.yaml
@@ -5,7 +5,7 @@ icon: https://raw.githubusercontent.com/RSS-Bridge/rss-bridge/master/static/logo
 
 type: application
 
-version: 1.0.1+up2025.08.05
+version: 1.0.2+up2025.08.05
 appVersion: "2025-08-05"
 
 maintainers:
diff --git a/rss-bridge/templates/_helpers.tpl b/rss-bridge/templates/_helpers.tpl
index bab5acb..f05cc2a 100644
--- a/rss-bridge/templates/_helpers.tpl
+++ b/rss-bridge/templates/_helpers.tpl
@@ -63,7 +63,7 @@ Handles plain numbers ("2", "0.5", 1073741824), decimal ("1.5Gi"), binary
 results are printed without a decimal point.
 */}}
 {{- define "rss-bridge.multiplyQuantity" -}}
-{{- $quantity := printf "%v" .quantity -}}
+{{- $quantity := include "rss-bridge.formatNumber" .quantity -}}
 {{- $number := regexFind "^[0-9]+(\\.[0-9]+)?" $quantity -}}
 {{- if not $number -}}
 {{- fail (printf "cannot parse resource quantity %q" $quantity) -}}
@@ -76,7 +76,24 @@ results are printed without a decimal point.
 {{- if eq $product (floor $product) -}}
 {{- printf "%d%s" (int64 $product) $suffix -}}
 {{- else -}}
-{{- printf "%v%s" $product $suffix -}}
+{{- printf "%s%s" (include "rss-bridge.formatNumber" $product) $suffix -}}
+{{- end -}}
+{{- end -}}
+
+{{/*
+Render a number as a plain decimal string, never in exponential notation.
+
+Why this exists (issue #157): the null-safe fallback helpers pass values
+through fromYaml, which parses every number as float64. Go's "%v" switches
+float64 to exponential notation from about 1e6 upwards, so a bare byte count
+like 1048576 became "1.048576e+06" - not a valid Kubernetes quantity, and the
+render aborted. Strings ("512Mi") are passed through untouched.
+*/}}
+{{- define "rss-bridge.formatNumber" -}}
+{{- if kindIs "float64" . -}}
+{{- regexReplaceAll "\\.?0+$" (printf "%.10f" .) "" -}}
+{{- else -}}
+{{- printf "%v" . -}}
 {{- end -}}
 {{- end -}}